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Source Localisation and Joint Velocity Model BuildingNormal access

Authors: L. Diekmann, B. Schwarz, A. Bauer and D. Gajewski
Event name: 80th EAGE Conference and Exhibition 2018
Session: Poster: From Microseismic Data To Source Classification And Inversion
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201801581
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 3.49Mb )
Price: € 20

Summary:
We present a fully automatic localisation and joint velocity model building scheme that needs no other a priori information than the locally constant near surface velocity. It is based on attributes, which are related to the directions and the curvatures of the recorded wavefronts, and proves to be reliable even for high levels of noise contamination and amplitude-weak events. These wavefront attributes are estimated using local coherence analysis and represent the input for wavefront tomography which eventually leads to a joint estimation of the spatial source location and the overburden velocity distribution. We demonstrate the feasibility of the proposed workflow with a 2D synthetic example and demonstrate the applicability of the wavefront attribute estimation to 3D data.


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